September Holidays, National Days & Observances
September stands at the doorway between summer and fall, bringing Labor Day, back-to-school traditions, Patriot Day, Constitution Day, wildlife celebrations, international observances and the first cozy hints of autumn. From books and wilderness to pizza, coffee and cider, there is something worth celebrating all month long.
Holiday Helper note: Some observances are official holidays, while others are cultural, religious, awareness-based or unofficial fun days. Dates for movable observances can change from year to year.
Major September Holidays & Observances
First Monday: Labor Day is a U.S. federal holiday honoring the contributions and achievements of American workers.
September 8: International Literacy Day highlights the importance of literacy around the world.
September 11: Patriot Day commemorates the lives lost in the September 11, 2001 terrorist attacks.
September 17: Constitution Day and Citizenship Day commemorates the signing of the U.S. Constitution and recognizes U.S. citizenship.
September 21: International Day of Peace is a United Nations observance devoted to strengthening ideals of peace.
Around September 22–23: September Equinox marks the astronomical beginning of fall in the Northern Hemisphere.
September Observances That Move
Several important September celebrations follow weekday, astronomical or religious calendars rather than a permanent numbered date.
- Labor Day: first Monday in September in the United States.
- September equinox: generally September 22 or 23, depending on the year and time zone.
- World Maritime Day: observed on the last Thursday of September.
- Rosh Hashanah: changes annually according to the Hebrew calendar and may fall in September or October.
- Yom Kippur: changes annually according to the Hebrew calendar and may fall in September or October.
- Islamic and Hindu observances: move through the Gregorian calendar according to their respective calendars.
Looking ahead: In 2027, Labor Day falls on September 6. Because movable observances change from year to year, always check the current year's calendar when planning a celebration or event.
30 Days of September Celebrations
Browse the daily list below for major holidays, international observances, food days, early-autumn traditions, unusual celebrations and more.
September 1
- National Chicken Boy Day
- National No Rhyme (Nor Reason) Day
- National Burnt Ends Day
September 2
- National Blueberry Popsicle Day
- National V-J Day
September 3
September 3 offers two very different reasons to look up and look outward. National Skyscraper Day celebrates soaring architecture and the engineering behind remarkable city skylines, while National Wilderness Day encourages appreciation for forests, mountains, wildlife and the wild places that remain beyond our cities. Celebrate by exploring interesting architecture, taking a nature walk, learning about a favorite wild animal or spending time outdoors.
- National Skyscraper Day
- National Wilderness Day
September 4
National Wildlife Day keeps the nature theme going with another opportunity to celebrate animals, conservation and the wild places they depend on.
- National Wildlife Day
- National Macadamia Nut Day
- National Newspaper Carrier Day
September 5
International Day of Charity encourages charitable action around the world, while the United Nations now also observes September 5 as International Day of the World's Indigenous Women and Girls.
- International Day of Charity
- International Day of the World's Indigenous Women and Girls
- National Cheese Pizza Day
September 6
- National Read a Book Day
- National Coffee Ice Cream Day
September 7
- International Day of Clean Air for Blue Skies
- International Day of Police Cooperation
- World Duchenne Awareness Day
- National Beer Lover's Day
- National Salami Day
September 8
International Literacy Day celebrates literacy as a foundation for learning, opportunity and participation in society.
- International Literacy Day
- National Ampersand Day
- National Date Nut Bread Day
September 9
- International Day to Protect Education from Attack
- National Teddy Bear Day
- National Wiener Schnitzel Day
September 10
- World Suicide Prevention Day
- National TV Dinner Day
- National Swap Ideas Day
September 11
Patriot Day is observed in the United States in remembrance of those killed in the terrorist attacks of September 11, 2001.
- Patriot Day
- National Make Your Bed Day
- National Hot Cross Bun Day
September 12
- United Nations Day for South-South Cooperation
- National Video Games Day
- National Chocolate Milkshake Day
September 13
- National Peanut Day
- National Positive Thinking Day
- National Kids Take Over the Kitchen Day
September 14
- National Cream Filled Donut Day
- National Coloring Day
September 15
- International Day of Democracy
- National Online Learning Day
- National Double Cheeseburger Day
- National Linguine Day
September 16
- International Day for the Preservation of the Ozone Layer
- International Day for Interventional Cardiology
- International Day of Science, Technology and Innovation for the South
- National Guacamole Day
- National Cinnamon-Raisin Bread Day
September 17
Constitution Day and Citizenship Day commemorates the signing of the U.S. Constitution on September 17, 1787, and recognizes people who have become U.S. citizens.
- Constitution Day and Citizenship Day
- World Patient Safety Day
- National Apple Dumpling Day
- National Monte Cristo Day
September 18
- International Equal Pay Day
- National Cheeseburger Day
- National Rice Krispie Treat Day
September 19
- Talk Like a Pirate Day
- National Butterscotch Pudding Day
September 20
- World Cleanup Day
- National Pepperoni Pizza Day
- National String Cheese Day
September 21
International Day of Peace invites people around the world to reflect on peace and the everyday actions that help create safer, more cooperative communities.
- International Day of Peace
- World Alzheimer's Day
- National Pecan Cookie Day
September 22
- National Ice Cream Cone Day
- National White Chocolate Day
- National Elephant Appreciation Day
September 23
- International Day of Sign Languages
- National Checkers Day
- National Great American Pot Pie Day
September 24
- World Maritime Day (date can vary by year)
- National Punctuation Day
- National Cherries Jubilee Day
September 25
- National Comic Book Day
- National Lobster Day
- National One-Hit Wonder Day
September 26
- International Day for the Total Elimination of Nuclear Weapons
- National Pancake Day
- National Key Lime Pie Day
September 27
- World Tourism Day
- National Chocolate Milk Day
- National Corned Beef Hash Day
September 28
- International Day for Universal Access to Information
- National Good Neighbor Day
- National Strawberry Cream Pie Day
September 29
National Coffee Day shares September 29 with an important United Nations observance focused on reducing food loss and waste.
- International Day of Awareness of Food Loss and Waste
- World Heart Day
- National Coffee Day
September 30
September closes with International Translation Day and the warm, autumnal combination of National Love People Day and hot mulled cider.
- International Translation Day
- National Love People Day
- National Hot Mulled Cider Day
More Ways to Celebrate September
September is a beautiful month for enjoying the shift from summer into fall. Take a walk in the wilderness, visit a local park, admire the architecture in your town or city, curl up with a good book or spend an afternoon outside noticing the first seasonal changes.
The month's observances also offer plenty of opportunities to learn and connect. Read together for International Literacy Day, explore American history around Constitution Day, do something kind for a neighbor, talk about peace with children or turn Talk Like a Pirate Day into an afternoon of wonderfully silly family fun.
And then there are the flavors of September. Celebrate with pizza, pancakes, apple dumplings, pot pie, guacamole, chocolate milk or a favorite coffee drink. As the evenings begin to cool, a mug of hot mulled cider is a fitting way to welcome the first cozy days of autumn.
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